Question about 2004 Jeep Grand Cherokee

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V6 prado engine miss/limiting

I rev egine and it limits at 3000rpm. is smooth idle up until it limits. Checked leads, coils, and plugs and all ok. Loaded coils up on a tester and also replaced fuel filter. Cant plug my scaner in due to plug been different but there is no engine light on dash. any ideas before i take to toyota workshop??

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Plugged catelitic converter or exhaust plugged

Posted on Feb 17, 2014

Testimonial: "Just cut exhaust off before cat converter and no change. Also checked cambelt timing today. all ok. Prety stuck ay..."

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Posted on Jan 02, 2017

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SOURCE: PO171 OBD-II Trouble Code " System Lean To Bank 1

Check PCV valve and be sure it is not stuck open.  Check for vacuum leak at intake manifold.  

Posted on Jan 01, 2009

  • 43 Answers

SOURCE: Very rough idle on 2002 Jeep Grand Cherokee Limited Edition V8

If you haven't changed the plugs or had the fuel system cleaned, now would be a good time to do it. The number 1 culprit for rough idles is dirty injectors or plugs. You can try an injector cleaner in a can (or bottle) for under $10 and see if it helps, and then work from there. If there isn't any improvement then if you are able to, check the plugs for any gunky buildup and if you find a bad plug, make sure you replace them all (or have them replaced) at the same time.

Posted on Aug 03, 2009

  • 13 Answers

SOURCE: Have no power on acceleration, backfires 4.0L Jeep

could it be your throttle sensor? If it is a carbureted engine, check the accelerator pump inside the carb.

Posted on Aug 03, 2009

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96 3.1 rev limiter at 2900 -3000rpm. Went through vaccume sys. Comp.coil assy.egr. tps.cam and crank sensors test good. Correct fuel pressure running and not. Maf is responsive, anything im missing?


The rev limiter is built into the PCM. If the vehicle will not get past the RPMS you have indicated and all sensors test good, check for a plugged exhaust system. The catalytic converter could be restricted/plugged. You can remove the front 02 sensor ( which will allow the exhaust to breath somewhat better ) and see if the vehicle will come up in RPM. IF it does, suspect a plugged exhaust.

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some of the computer have a rev limiter built in and it would give you what you are writing about there my not be anything wrong

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1996 T100 V6 CHANGE tps, 3 coils ,spark plg,wires, check fuel pressure ,itwill not rev above 3000 rpm??


may be a vacuum hose is rotted out that leads to a device only activated over that limit; or a vacuum device that just fails to maintain good vacuum when it hits that level of demand.

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Hi my nissan pulsar n13 misses at about 1500 to 2000 rpm have replaced: spark plug leads, coil, distributor cap, rotor. have also clean throttle housing and set the timing


Try taking your air cleaner cover off, and rev the engine to about 3000rpm, put a clean lint free cloth or your hand over the mouth of the carburettor and the engine will die. Try to keep it going for about 10 seconds at about 1500 rpm and take the cloth away until it runs smoothly again at 3000 rpm. Air cleaner back on and see if that makes a difference. It is an effective way of clearing jets that are not too badly blocked.

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Have a 2003 taurus with 3.o liter v6. At around 4200 rpm the engine starts to miss like it is a rev limiter. Am I right or is this another problem. Is smooth all the way to 4200 and then misses  ...


Yes it will act like it has a miss if the car is in park and you rev the car up, but if you are going down the road and hit 4200 rpm's it should not. Try checking the computer and see if it has any codes pending or hard codes in it.

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1999 Lincoln Continental 4.6 32v engine...idles smooth in park & in gear. In park I get a engine miss when revved to 4000rpm. Also seem/feels like I have a miss at lower engine speed when being driven....


hello, i first must ask why that engine would EVER be reved to 4000 RPM? it is likely you are up against the rev-limiter and your ignition is made not to over rev. be very careful....4000 RPM on that engine could/will severly damage your tourque convertor........very expensive it is common for the EGR passages on that model to plug up with carbon, remove valve, clean ports, and retest for low speed miss/hesitation, good luck....marty

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Reving problem on 2001 santa fe


when you try to rev it up does it sort of rev up and down like a rythm?
If so that is a safety thing to keep people from blowing up there engines. My truck does that too. It sounds like it's not getting gas at hi rpm's. Only floor it when your driving don't try to show off the rev you'll blow it

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